Improvement in latches for sliding doors



W. s. OARLISLE. Latch for Sliding Door.

No. 201,747. Patented March 26,1878.

ATTORNEYS N. PEIERS, FHOTO-LITHOGRAPHER, WASHINGTON. D C.

UNITED STATES PATENT OFFICE.

WILLIAM s. CARLISLE, on WATERTOWN, NEW YORK.

IMPROVEMENT IN LATCHES FOR SLIDING DOORS.

Specification forming part of Letters Patent No. 201,747, dated March 26, 1878:; application filed February 26, 1878.

To all whom it may concern:

Be it known that I, WILLIAM S. GARLIsLE, of Watertown, in the State of New York, have invented certain new and useful Improvements in Locks; and do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon, making a part of this specification.

The nature of my invention consists in the construction and arrangement of a lock designed for sliding doors, more particularly for barns, railroads, &c., as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my invention appertains to make and use the same, I will now proceed to describethe construction and operation, referring to the annexed drawing, which represents a view of my lock with the face-plate of the case removed.

A represents the lock-case, having its top made circular, the circle being described from the center of the hole for the spindle. B represents the latch, formed with two segments, G G, extending above and below the main body of the latch, long enough to close the slot J in the side of the look when the latch is either locked or raised out of the way. The upper segment terminates in a lug, I, and the lower is provided with a catch, H.

On both sides of the latch and segments are flanges 1*, described fromthe same center as the top of the case. The latch B projects through the slot J, and terminates in a hooked form, B, as shown, and is to engage, when lpcked, with some suitable catch tohold the oor.

G is a bolt, and D tumbler with spring D, operated by a key. This bolt is to engage the catch H, as shown in the drawing, and thus secure the latch in place, preventing its being raised.

E is a spring, secured to the inside of the case A by a screw, a, and is so constructed as 4 to engage automatically the lug I when the latch is thrown back, thus holding it in a nearly upright position, so that it will not project beyond the edge of the door. 7

The latch rotates in the center of the case, which makes it equally suitable for right and left hand doors.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The latch B, provided with the segments G G, flanges F F, lug I, and catch H, and rotating within the case A, the end of the latch projecting beyond the casing, and terminating in a hook, B, all as herein set forth.

2. The combination of the bolt O, tumbler D, and the catch H on the lower segment of the latch, for the purposes described.

3. The spring E, in combination with the lug I on the upper segment of the latch, for the purposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 12th day of February, 1878.

- WM. S. OARLISLE. Witnesses:

CHAS. G. GHAMPLIN, JAMES E. LoUoKs. 

